US PATENT SUBCLASS 525 / 417
.~.~ Solid polymer derived from heterocyclic materials as sole reactants wherein each of the heterocyclic materials contains a hetero ring other than solely as a lactam, 1,2-epoxy or carboxylic acid anhydride and wherein none of the reactants contains a plurality of methylol groups or derivatives thereof

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525 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {4}
50  DF  .~ MIXING OF TWO OR MORE SOLID POLYMERS; MIXING OF SOLID POLYMER OR SICP WITH SICP OR SPFI; MIXING OF SICP WITH AN ETHYLENIC AGENT; MIXING OF SOLID POLYMER WITH A CHEMICAL TREATING OR ETHYLENIC AGENT; OR PROCESSES OF FORMING OR REACTING; OR THE RESULTANT PRODUCT OF ANY OF THE ABOVE OPERATIONS {32}
417.~.~ Solid polymer derived from heterocyclic materials as sole reactants wherein each of the heterocyclic materials contains a hetero ring other than solely as a lactam, 1,2-epoxy or carboxylic acid anhydride and wherein none of the reactants contains a plurality of methylol groups or derivatives thereof

DEFINITION

Classification: 525/417

Solid polymer derived from heterocyclic materials as sole reactants wherein each of the heterocyclic materials contains a hetero ring other than solely as a lactam, 1,2-epoxy or carboxylic acid anhydride and wherein none of the reactants contains a plurality of methylol groups or derivatives thereof:

(under subclass 50) Subject matter involving processes of mixing a solid polymer derived from heterocyclic materials as sole reactants other than solely as a lactam, 1,2-epoxy, or carboxylic acid anhydride, with an additional solid polymer and wherein none of the heterocyclic materials contains a plurality of methylol groups or derivatives thereof, with specified intermediate condensation product, with specified polymer-forming ingredients, with chemical treating agent or with ethylenic agent; processes or products resulting from the mixing processes (e.g., polyepisulfide, polyethylenimine, etc.).

(1) Note. This subclass does not regard a lactam, 1,2-epoxy group, or cyclic carboxylic acid anhydride as being heterocyclic and, therefore, when these groups are present must be part of a compound which contains a heterocyclic group proper for this subclass.

(2) Note. Excluded from this subclass are any heterocyclic reactants which contain a plurality of methylol groups or derivatives thereof and see the Glossary and subclass 398 for a definition of the terms "methylol" and "methylol derivative".

SEE OR SEARCH THIS CLASS, SUBCLASS:

509+, for methylolated melamine since this is not considered a single reactant but a mixture of two reactants, namely,

melamine and formaldehyde.

SEE OR SEARCH CLASS

526, Synthetic Resins or Natural Rubbers, for a definition of the term "carboxylic acid or derivative" which defines "lactum".